sellon



(No Model.)

J. S. SELLON.

INUANDESGENT GAS BURNER.

No. 372,933. Patented Nov. 8, 1887.

* N PEiERS. Phnlo-Uthognpbcr. Wanhinglnn. ma

UNITED STATES PATENT OFFICE.

JOHN s. sELLoN, or HATTON GARDEN, COUNTY OF MmDLnsEx, ENGLAND.

INCANDESCENT GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 372,933, dated November 8, 1887.

Application filed February 14, 1887. Serial No. 227.577. (N model.) Patented in England November 23, 1886, No. 15,287, and

' January 25, 1887, No. 1,150.

in the county of Middlesex, England, have in vented certain new and useful Improvements in Incandescent Gas-Burners, (for which I have applied for patents in Great Britain on November 23, 1886,- No. 15,287, and on Januro ary 25, 1887, No. 1,150,) of which the following is a specification.

This invention relates to improvements in that class of apparatus for lighting and heating by consumption of gas and air, wherein gas is :5 caused to pass, together with air, to and is ignited at a reticulated or perforated termination which is rendered incandescent; and the object of my invention is to provide such a cap or termination which can be rendered and maintained incandescent without the material deterioration which has hitherto been an objection in this class of apparatus, wherein the caps as hitherto constructed are liable to break or disintegrate when made of earthy matter, or when made of platinum to sag or get out of shape; gradually losing a considerable amount of their power to become luminous. I make the cap or termination rigid by corrngating, fluti'ng, or ribbing the same horizontally,vertical1y,spirally,or otherwise. The ribs may be formed by making the cap of two or more sections provided lengthwise with projecting edges or ridges, and the contiguous edges or ridges may be burned together with N an oxyhydrogen or other suitable flame, or be so lapped or fixed together as toform ribs which will strengthen and retain the cap or termination in proper shape and position. The cap or terminal may be composed of an alloy 0 of platinum and iridium, the preferred proportions being platinum, eighty parts, and iridium, twenty parts.

In the accompanying drawings, Figure 1 is a sectional elevation of a lamp constructed in 5 accordance with the invention, and Fig. 2 is a cross-section of a cap or terminal.

A is the lamp-burner, to which gas under pressure is supplied by a pipe, B, passing through the column 0 of the lamp, and provided witha cock, D, for regulating, as required, the passage of gas to they burner. In the column 0, and below the top of the gaspipe B, are openings E, throughwhich air isadmitted to the interior of the column to mix with the gas in its passage to the burner, and the amount of air admitted may be governed by regulating the size of the openings bya covering-ring, or by regulating the supply of gas according to the pressure of the gas. On the burner A, I fix a perforated or wire-gauze cap or terminal, F, of the character hereinbefore described, which upon lighting the mixture of air and gas becomes highly heated, and when in an incandescent state emits a brilliant light.

In order to prevent the cap or terminal F from sagging or getting out of shape by the great heat to which it is subjected, I provide it with ribs or corrugations a, extending lengthwise from top to bottom, as shown in Fig. 1, and in the crosssection, Fig. 2; or I may arrange the corrugations or ribs spirally, or otherwise, if desired,and for the purpose of further securing the durability of the terminal I prefer to construct it of an alloy of platinum and iridium,.as hereinbefore described. Although I have illustrated on the drawings a conical cap or terminal, I do not restrict myself to that form, as it is obvious that it may be made in a great number of forms.

Having now described my invention, I declare that what I claim is In a burner, an incandescing gage or terminal formed with strengthening-corrugations,

substantially as described. 

